The Motion Imagery Standards Board (MISB) is engaged in multiple initiatives that may provide support for
Activity-Based GeoINT (ABG). This paper describes a suite of approaches based on previous MISB work on a
standards-based architecture for tracking. It focuses on ABG in the context of standardized tracker results, and shows
how the MISB tracker formulation can formalize important components of the ABG problem. The paper proposes a
grammar-based formalism for the reporting of activities within a stream of FMV or wide-area surveillance data.
Such a grammar would potentially provide an extensible descriptive language for ABG across the community.